All FX Series PLCs are equipped with built-in open collector high-speed counters; up to 60 kHz for the FX3G/FX3GC/FX3S and up to 100 kHz for the FX3U/FX3UC. These high-speed inputs are connected to external devices such as encoders and ultrasound sensors for system feedback control. The FX3U main unit can be expanded with high-speed input special adapters, enabling differential line receiver inputs up to 200 kHz.
Inverter Control
Also know as Variable Frequency Drives (VFDs), Inverters play a vital role in many conveyor, pumping, and positioning systems. While the output frequency of the inverter can be varied easily using analog outputs on any on the FX Series PLCs, transfer of both parameters and commands between the PLC and Mitsubishi Inverters can be handle in FX3 series PLCs through serial communication using FREQROL protocol. Each RS-485 interface on an FX3 series PLC can control up to 8 inverters with a total network extension of up to 500m when using the FX3U-485ADP-MB
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